Cathode



M. E. FULD.

Dec. 26, 1922.

CATHODE.

man SEPLM, 1920.

TEANES E. FULD, 0E BALTBEORE, Idil-LEYLAND.

CATHIDE.

Application filed September 21, y192th Serial No. 411,302.

Une object oit my invention is to provide a cathode for a battery cell comprising" a conducting; wirehaving` u de golarirting niaterial in electric connection therewith7 and a wrapping oi fibrous material bound around said depolarizing material by a. conducting` iilzunent in such manner as to retain the wrapping in close Contact with the degolarizing material, without establishing; a path oit lower resistance between said filament and the anode of the battery with which my improved cathode is used, than the paths between the other portions oi" ray improved cathode and said anode.

ln Carrying out my invention7 l maire use oi' the insti'unientalities illustrated in the aceompanyinggdrawings, in which :---v

1 is a sectional view of a eell, showing' my in'ipi'oved cathode therein.

llig. 2 is a perspective view oit .my improved cathode. f C

3 is an enlarged partial longitudine. section oit the bottom portion of my improved cathode. v ln the drawings i My improved cathode 14.- comprises a cathodic conductor 15 which, in my preferred Jorm of cathode, is composed of silver. A. Cylinder 16, composed ot Chloride or" silver which serves as depolariaer. is east around the .lower portion of the cathodio conductor 1.1 The cylinder 16 does not extend 'to the lower end ofthe cathodio oonductor 15, but a` small portion 1 7 of said conductor extends below said Cylinder for a purpose hereinafter explained. The cyl inder 16 is provided with a spiral groove 18 east or otherwise formed in the cylindrical surface thereof.

The Wrapping 19 is placed over the cylinder 16 and the ends of said wrapping are 17 oi the conductor 15, as at 24.

folded over the/ends of said cylinder as at` 20 and 21.` rihe filament lywhif'h in my preferred form of Cathode is a silver wire, has ooe end wound around the Conduct( l5 adj acont to the upper end of the cylinder 1G,

as at 23, said ilanient is then wound around the wrapping 19 and presses said wrap' e into thegroove 'lgthe other end of the lilament 22 is then .vrappe/l around the portion vl/"hen the filament is wound around. the wrapping 19, it presses said wrapoing into the groove itl until' the outer suriaee` of said filament is at approizimately fthe saine, or a less, disance trom the airis ot the cylinder 1G than the distansje of the cylindrical surface ot said wrapping' 'from said axis.

Villiers the ends of the filament are car-` ried across the wrapping at the ends of the eylinder as at 2O `and 21and wound around the conductor 15, as at 23 and 2&3.- said ends oit' the iilament serve to secure the folded over ends of the wrapping 19.

The fibrous wrapping` 19 serves to hold any -particlesthat might break` away fromv the chloride ot silver cylinder 16 and also prevents the short oifeuiting of the battery which might otherwise take place by the formation of a bridge of metalliry particles between the cathode and the anode.k

l have sli-own one embodiment o my im proved cathode but it is evidentthat many changes may be made therein `without departing from the spiritthereot i As a new article or" mannfacture'.` a cathode comprising a conductor, a oylindero'i depolarizing material. molded around said conductor andr yformed with spiral groove extending throughout the `length of said cylinder, a fibrous wrapper around said cylinder and folded over the ends thereof and a wireconnectedat one end to said conducl tor passing,` over the folded end of said paper and around said wrapper pressing it into said groove9 then over the folded` end of said wrapper and having its other end connectedy to said Conductor.

in testimony whereof7 l aihx `my signature.

Mauss il; ruinu 

